HPACEL(4) | Device Drivers Manual | HPACEL(4) |
hpacel
— HP 3D
DriveGuard accelerometer
hpacel* at acpi?
The hpacel
device driver supports
accelerometers that are commonly available in Hewlett-Packard laptops. The
supported chip is LIS3LV02DL
from
STMicroelectronics, although other chips from the same family, such as
LIS3LV02DQ
, may also work, provided that the vendor
has implemented suitable ACPI
access methods.
The hpacel
driver reports the acceleration
readings of the X-, Y-, and Z-axis via the
envsys(4) API and the
envstat(8) command.
acpi(4), aps(4), hpqlb(4), wmihp(4)
STMicroelectronics, LIS3LV02DL: 3-Axis - ±2g/±6g digital output low voltage linear accelerometer. AN2381 Application Note, Revision 1, http://www.st.com/stonline/products/literature/anp/12441.pdf, June, 2006.
The hpacel
device driver appeared in
NetBSD 6.0.
Jukka Ruohonen ⟨jruohonen@iki.fi⟩
The used accelerometer chip is capable of generating wake-up,
direction detection, and free-fall interrupts. In the ideal situation these
could be used to evoke possible emergency action. However, the
hpacel
driver only reports the readings from the
accelerometer via
sysmon_envsys(9).
September 7, 2011 | NetBSD 10.99 |